var rotateLeft = function(lValue, iShiftBits) {
	return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
}

var addUnsigned = function(lX, lY) {
	var lX4, lY4, lX8, lY8, lResult;
	lX8 = (lX & 0x80000000);
	lY8 = (lY & 0x80000000);
	lX4 = (lX & 0x40000000);
	lY4 = (lY & 0x40000000);
	lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
	if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
	if (lX4 | lY4) {
		if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
		else return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
	} else {
		return (lResult ^ lX8 ^ lY8);
	}
}

var F = function(x, y, z) {
	return (x & y) | ((~ x) & z);
}

var G = function(x, y, z) {
	return (x & z) | (y & (~ z));
}

var H = function(x, y, z) {
	return (x ^ y ^ z);
}

var I = function(x, y, z) {
	return (y ^ (x | (~ z)));
}

var FF = function(a, b, c, d, x, s, ac) {
	a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);
};

var GG = function(a, b, c, d, x, s, ac) {
	a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);
};

var HH = function(a, b, c, d, x, s, ac) {
	a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);
};

var II = function(a, b, c, d, x, s, ac) {
	a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));
	return addUnsigned(rotateLeft(a, s), b);
};

var convertToWordArray = function(string) {
	var lWordCount;
	var lMessageLength = string.length;
	var lNumberOfWordsTempOne = lMessageLength + 8;
	var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
	var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;
	var lWordArray = Array(lNumberOfWords - 1);
	var lBytePosition = 0;
	var lByteCount = 0;
	while (lByteCount < lMessageLength) {
		lWordCount = (lByteCount - (lByteCount % 4)) / 4;
		lBytePosition = (lByteCount % 4) * 8;
		lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
		lByteCount++;
	}
	lWordCount = (lByteCount - (lByteCount % 4)) / 4;
	lBytePosition = (lByteCount % 4) * 8;
	lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
	lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
	lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
	return lWordArray;
};

var wordToHex = function(lValue) {
	var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount;
	for (lCount = 0; lCount <= 3; lCount++) {
		lByte = (lValue >>> (lCount * 8)) & 255;
		WordToHexValueTemp = "0" + lByte.toString(16);
		WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
	}
	return WordToHexValue;
};

var uTF8Encode = function(string) {
	//string = string.replace(/\x0d\x0a/g, "\x0a");
	var output = "";
	for (var n = 0; n < string.length; n++) {
		var c = string.charCodeAt(n);
		if (c < 128) {
			output += String.fromCharCode(c);
		} else if ((c > 127) && (c < 2048)) {
			output += String.fromCharCode((c >> 6) | 192);
			output += String.fromCharCode((c & 63) | 128);
		} else {
			output += String.fromCharCode((c >> 12) | 224);
			output += String.fromCharCode(((c >> 6) & 63) | 128);
			output += String.fromCharCode((c & 63) | 128);
		}
	}
	return output;
};
	
var String2Bytes = function(content){
	content = encodeURIComponent(content);
	content = content.replace(/\+/igm," ");
	var ret="",i=0,c;
	while(i<content.length){
		c = content.substr(i,1);
		if(c=="%"){
			ret += String.fromCharCode(parseInt("0x"+content.substr(i+1,2)));
			i+=3;
		}else{
			ret += c;
			i++;
		}
	}
	return ret;
}
var MoLibMD5 = function(string) {
	string = string +"";
	var x = Array();
	var k, AA, BB, CC, DD, a, b, c, d;
	var S11=7, S12=12, S13=17, S14=22;
	var S21=5, S22=9 , S23=14, S24=20;
	var S31=4, S32=11, S33=16, S34=23;
	var S41=6, S42=10, S43=15, S44=21;
	string = String2Bytes(string);
	x = convertToWordArray(string);
	a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
	for (k = 0; k < x.length; k += 16) {
		AA = a; BB = b; CC = c; DD = d;
		a = FF(a, b, c, d, x[k+0],  S11, 0xD76AA478);
		d = FF(d, a, b, c, x[k+1],  S12, 0xE8C7B756);
		c = FF(c, d, a, b, x[k+2],  S13, 0x242070DB);
		b = FF(b, c, d, a, x[k+3],  S14, 0xC1BDCEEE);
		a = FF(a, b, c, d, x[k+4],  S11, 0xF57C0FAF);
		d = FF(d, a, b, c, x[k+5],  S12, 0x4787C62A);
		c = FF(c, d, a, b, x[k+6],  S13, 0xA8304613);
		b = FF(b, c, d, a, x[k+7],  S14, 0xFD469501);
		a = FF(a, b, c, d, x[k+8],  S11, 0x698098D8);
		d = FF(d, a, b, c, x[k+9],  S12, 0x8B44F7AF);
		c = FF(c, d, a, b, x[k+10], S13, 0xFFFF5BB1);
		b = FF(b, c, d, a, x[k+11], S14, 0x895CD7BE);
		a = FF(a, b, c, d, x[k+12], S11, 0x6B901122);
		d = FF(d, a, b, c, x[k+13], S12, 0xFD987193);
		c = FF(c, d, a, b, x[k+14], S13, 0xA679438E);
		b = FF(b, c, d, a, x[k+15], S14, 0x49B40821);
		a = GG(a, b, c, d, x[k+1],  S21, 0xF61E2562);
		d = GG(d, a, b, c, x[k+6],  S22, 0xC040B340);
		c = GG(c, d, a, b, x[k+11], S23, 0x265E5A51);
		b = GG(b, c, d, a, x[k+0],  S24, 0xE9B6C7AA);
		a = GG(a, b, c, d, x[k+5],  S21, 0xD62F105D);
		d = GG(d, a, b, c, x[k+10], S22, 0x2441453);
		c = GG(c, d, a, b, x[k+15], S23, 0xD8A1E681);
		b = GG(b, c, d, a, x[k+4],  S24, 0xE7D3FBC8);
		a = GG(a, b, c, d, x[k+9],  S21, 0x21E1CDE6);
		d = GG(d, a, b, c, x[k+14], S22, 0xC33707D6);
		c = GG(c, d, a, b, x[k+3],  S23, 0xF4D50D87);
		b = GG(b, c, d, a, x[k+8],  S24, 0x455A14ED);
		a = GG(a, b, c, d, x[k+13], S21, 0xA9E3E905);
		d = GG(d, a, b, c, x[k+2],  S22, 0xFCEFA3F8);
		c = GG(c, d, a, b, x[k+7],  S23, 0x676F02D9);
		b = GG(b, c, d, a, x[k+12], S24, 0x8D2A4C8A);
		a = HH(a, b, c, d, x[k+5],  S31, 0xFFFA3942);
		d = HH(d, a, b, c, x[k+8],  S32, 0x8771F681);
		c = HH(c, d, a, b, x[k+11], S33, 0x6D9D6122);
		b = HH(b, c, d, a, x[k+14], S34, 0xFDE5380C);
		a = HH(a, b, c, d, x[k+1],  S31, 0xA4BEEA44);
		d = HH(d, a, b, c, x[k+4],  S32, 0x4BDECFA9);
		c = HH(c, d, a, b, x[k+7],  S33, 0xF6BB4B60);
		b = HH(b, c, d, a, x[k+10], S34, 0xBEBFBC70);
		a = HH(a, b, c, d, x[k+13], S31, 0x289B7EC6);
		d = HH(d, a, b, c, x[k+0],  S32, 0xEAA127FA);
		c = HH(c, d, a, b, x[k+3],  S33, 0xD4EF3085);
		b = HH(b, c, d, a, x[k+6],  S34, 0x4881D05);
		a = HH(a, b, c, d, x[k+9],  S31, 0xD9D4D039);
		d = HH(d, a, b, c, x[k+12], S32, 0xE6DB99E5);
		c = HH(c, d, a, b, x[k+15], S33, 0x1FA27CF8);
		b = HH(b, c, d, a, x[k+2],  S34, 0xC4AC5665);
		a = II(a, b, c, d, x[k+0],  S41, 0xF4292244);
		d = II(d, a, b, c, x[k+7],  S42, 0x432AFF97);
		c = II(c, d, a, b, x[k+14], S43, 0xAB9423A7);
		b = II(b, c, d, a, x[k+5],  S44, 0xFC93A039);
		a = II(a, b, c, d, x[k+12], S41, 0x655B59C3);
		d = II(d, a, b, c, x[k+3],  S42, 0x8F0CCC92);
		c = II(c, d, a, b, x[k+10], S43, 0xFFEFF47D);
		b = II(b, c, d, a, x[k+1],  S44, 0x85845DD1);
		a = II(a, b, c, d, x[k+8],  S41, 0x6FA87E4F);
		d = II(d, a, b, c, x[k+15], S42, 0xFE2CE6E0);
		c = II(c, d, a, b, x[k+6],  S43, 0xA3014314);
		b = II(b, c, d, a, x[k+13], S44, 0x4E0811A1);
		a = II(a, b, c, d, x[k+4],  S41, 0xF7537E82);
		d = II(d, a, b, c, x[k+11], S42, 0xBD3AF235);
		c = II(c, d, a, b, x[k+2],  S43, 0x2AD7D2BB);
		b = II(b, c, d, a, x[k+9],  S44, 0xEB86D391);
		a = addUnsigned(a, AA);
		b = addUnsigned(b, BB);
		c = addUnsigned(c, CC);
		d = addUnsigned(d, DD);
	}
	var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
	return tempValue.toLowerCase();
};
exports.md5 = MoLibMD5;